I can't remember my trig!

NRS

Junior Member
Joined
Sep 14, 2009
Messages
62
Hi, I have a calc test coming up, with a lot of limits and derivatives on it and I was wondering if somone could provide me with a good list of basic identities to memorize, I don't remember them increadibly well. I don't mind if you don't write domn the actual identities, just their names would be fine as I can Google them later.
 
NRS said:
Hi, I have a calc test coming up, with a lot of limits and derivatives on it and I was wondering if somone could provide me with a good list of basic identities to memorize, I don't remember them increadibly well. I don't mind if you don't write domn the actual identities, just their names would be fine as I can Google them later.

How about this? YOU can Google "trigonometric identities"

You'll find them!
 
I guess the best way to help someone is teaching them to help themselves... :(
Thanks.
 
NRS said:
I guess the best way to help someone is teaching them to help themselves... :(
Thanks.

There's an old proverb which says

If you give a man a fish, he eats for a day, but if you teach a man to fish, he eats for a lifetime.
 
Perhaps this poem will be of some avail to you.

Beginning with "S," oh that's the Sine,

Opposite next, to keep you in line,

Hypotenuse follows, and then you will know,

Opposite over Hypotenuse equals Sine there you go.


Cosine will follow the "C" gives the clue,

Next is Adjacent, followed by Hypotenuse too,

Now you are rolling and having some fun,

Adjacent over Hypotenuse, the Cosine is won.


Then onto the "T" the Tangent we face,

Opposite and Adjacent finish the race,

It's clear now, you have the key to the throne,

Opposite over Adjacent, the Tangent we own.


Let no man deceive you, let none blind your path,

To this mystery Chief who teaches you math,

Many have hearkened his voice to hear clear,

And master their trig, year after year.


-From the poem "Chief SOHCAHTOA" from the collection Poems for the Mathematically Insecure

Note: I met Chief Soh-Cah-Toa in my youth, He was from the Fagawi tribe of Northern California, Unfortunately he nor any member of his tribe are still with us.
 
Top